Neanderthal-human baby-making was recent - and brief
Briefly

Study pinpointed the brief time window around 60,000 years ago when Neanderthals in western Eurasia interbred with Homo sapiens migrating out of Africa.
Previous estimates of gene flow between Neanderthals and Homo sapiens ranged from 50,000 to 60,000 years ago; new research refines this to a narrower timeframe.
Analysis of ancient and modern genomes revealed that nearly every person outside Africa carries genetic remnants of Neanderthal interbreeding, indicating extensive mixing.
Genetic study by Leonardo Iasi and team analyzed 58 ancient individuals and 231 modern ones to track Neanderthal DNA sequences' appearance and retention in Homo sapiens genomes.
Read at Nature
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